Across
1
Measure of matter in an object
3
Compound containing oxygen
6
Blocking of light by a celestial body
8
Glass that splits light into spectrum
Down
2
Biological catalyst
4
Ball of burning gas in space
5
Naturally occurring inorganic solid
7
Curved glass that refracts light
9
Magnetic metallic element
10
Preserved remains of ancient life
11
Smallest unit of an element